Preheat the oven to 400℉. Grease a 12-cup muffin tin.
In a large bowl, mix together the flour, 1 teaspoon of the salt, and the baking powder.
Mix in ½ cup of the oil and the cold water until uniform in texture.
Divide the dough into 12 equal balls. Place a dough ball in each prepared muffin cup. Press the dough into the bottom and up the sides to form a mini crust.
In a small skillet, heat the remaining 1 tablespoon oil over medium heat.
Add the onion and sauté until soft, about 5 minutes.
In a large bowl, whisk the eggs together.
Add the spinach, cooked onion, all of the cheeses, consommé powder, garlic powder, remaining 1 teaspoon salt, black pepper, and cayenne. Mix thoroughly. Adjust seasoning to taste.
Divide-the spinach mixture equally into the mini crusts.
Bake for 30–40 minutes, or until cooked through.
Serve warm or at room temperature.